diff --git a/source/de/anomic/kelondro/kelondroColumn.java b/source/de/anomic/kelondro/kelondroColumn.java
index f2fffa0cd..1d0f01033 100644
--- a/source/de/anomic/kelondro/kelondroColumn.java
+++ b/source/de/anomic/kelondro/kelondroColumn.java
@@ -174,6 +174,8 @@ public class kelondroColumn {
             this.encoder = encoder_bytes;
         }
         
+        assert (this.celltype != celltype_cardinal) || (this.encoder == encoder_b64e) || (this.encoder == encoder_b256);
+        
         // parse/check description
         if ((celldef.length() > 0) && (celldef.charAt(0) == '"')) {
             p = celldef.indexOf('"', 1);
diff --git a/source/de/anomic/kelondro/kelondroRow.java b/source/de/anomic/kelondro/kelondroRow.java
index d2966d1f7..e9e235afb 100644
--- a/source/de/anomic/kelondro/kelondroRow.java
+++ b/source/de/anomic/kelondro/kelondroRow.java
@@ -261,6 +261,7 @@ public class kelondroRow {
                             try {
                                 setCol(nick, Long.parseLong(elts[i].substring(p + 1).trim()));
                             } catch (NumberFormatException e) {
+                            	serverLog.logSevere("kelondroRow", "NumberFormatException for celltype_cardinal; row = " + i + ", celltype = " + row[i].celltype() + ", encoder = " + row[i].encoder() + ", value = '" + elts[i].substring(p + 1).trim() + "'");
                                 setCol(nick, 0);
                             }
                         } else if ((decimalCardinal) && (row[i].celltype() == kelondroColumn.celltype_binary)) {
@@ -268,6 +269,7 @@ public class kelondroRow {
                             try {
                                 setCol(nick, new byte[]{(byte) Integer.parseInt(elts[i].substring(p + 1).trim())});
                             } catch (NumberFormatException e) {
+                            	serverLog.logSevere("kelondroRow", "NumberFormatException for celltype_binary; row = " + i + ", celltype = " + row[i].celltype() + ", encoder = " + row[i].encoder() + ", value = '" + elts[i].substring(p + 1).trim() + "'");
                                 setCol(nick, new byte[]{0});
                             }
                         } else if ((decimalCardinal) && (row[i].celltype() == kelondroColumn.celltype_bitfield)) {